Development of ion beam figuring system with electrostatic deflection for ultraprecise X-ray reflective optics
Abstract
We developed an ion beam figuring system that utilizes electrostatic deflection. The system can produce an arbitrary shape by deterministically scanning the ion beam. The scan of the ion beam, which can be precisely controlled using only an electrical signal, enables us to avoid degradation of the mirror shape caused by imperfect acceleration or deceleration of a mechanically scanning stage. Additionally, this surface figuring method can easily be combined with X-ray metrology because the workpiece remains fixed during the figuring. We evaluated the figuring accuracy of the system by fabricating a plano-elliptical mirror for X-ray focusing. A mirror with a shape error of 1.4 nm root mean square (RMS) with a maximum removal depth of 992 nm, which corresponds to figuring accuracy of 0.14% RMS, was achieved. After the second shape corrections, an elliptical shape with a shape error of approximately 1 nm peak-to-valley, 0.48 nm RMS could be fabricated. Then, the mirror surface was smoothed by a low-energy ion beam. Consequently, a micro-roughness of 0.117 nm RMS, measured by atomic force microscopy, was achieved over an area of 1 × 1 μm{sup 2}.
- Authors:
-
- Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871 (Japan)
- Publication Date:
- OSTI Identifier:
- 22482771
- Resource Type:
- Journal Article
- Journal Name:
- Review of Scientific Instruments
- Additional Journal Information:
- Journal Volume: 86; Journal Issue: 9; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ACCELERATION; ACCURACY; ATOMIC FORCE MICROSCOPY; ION BEAMS; MIRRORS; SHAPE; X RADIATION
Citation Formats
Yamada, Jumpei, Matsuyama, Satoshi, Sano, Yasuhisa, and Yamauchi, Kazuto. Development of ion beam figuring system with electrostatic deflection for ultraprecise X-ray reflective optics. United States: N. p., 2015.
Web. doi:10.1063/1.4929323.
Yamada, Jumpei, Matsuyama, Satoshi, Sano, Yasuhisa, & Yamauchi, Kazuto. Development of ion beam figuring system with electrostatic deflection for ultraprecise X-ray reflective optics. United States. https://doi.org/10.1063/1.4929323
Yamada, Jumpei, Matsuyama, Satoshi, Sano, Yasuhisa, and Yamauchi, Kazuto. 2015.
"Development of ion beam figuring system with electrostatic deflection for ultraprecise X-ray reflective optics". United States. https://doi.org/10.1063/1.4929323.
@article{osti_22482771,
title = {Development of ion beam figuring system with electrostatic deflection for ultraprecise X-ray reflective optics},
author = {Yamada, Jumpei and Matsuyama, Satoshi and Sano, Yasuhisa and Yamauchi, Kazuto},
abstractNote = {We developed an ion beam figuring system that utilizes electrostatic deflection. The system can produce an arbitrary shape by deterministically scanning the ion beam. The scan of the ion beam, which can be precisely controlled using only an electrical signal, enables us to avoid degradation of the mirror shape caused by imperfect acceleration or deceleration of a mechanically scanning stage. Additionally, this surface figuring method can easily be combined with X-ray metrology because the workpiece remains fixed during the figuring. We evaluated the figuring accuracy of the system by fabricating a plano-elliptical mirror for X-ray focusing. A mirror with a shape error of 1.4 nm root mean square (RMS) with a maximum removal depth of 992 nm, which corresponds to figuring accuracy of 0.14% RMS, was achieved. After the second shape corrections, an elliptical shape with a shape error of approximately 1 nm peak-to-valley, 0.48 nm RMS could be fabricated. Then, the mirror surface was smoothed by a low-energy ion beam. Consequently, a micro-roughness of 0.117 nm RMS, measured by atomic force microscopy, was achieved over an area of 1 × 1 μm{sup 2}.},
doi = {10.1063/1.4929323},
url = {https://www.osti.gov/biblio/22482771},
journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 9,
volume = 86,
place = {United States},
year = {Tue Sep 15 00:00:00 EDT 2015},
month = {Tue Sep 15 00:00:00 EDT 2015}
}